Question

How can I put an array of arrayList into a Bundle?

ArrayList < myObjects >[] mElements;

Answer 1

Make YourObject implement the Parcelable interface, then use bundle.putParcelableArraylist(theParcelableArraylist).

Edit: whoops misread the question. Why do you want to save an array of arraylist? If its for persisting in an orientation change, maybe you want to use onRetainNonConfigurationInstance instead?

Edit 2: Ok, here goes. Create a new Wrapper class that implements Parcelable (note that myObjects also have to be parcelable). The writeToParcel method will look something like this:

public void writeToParcel(Parcel dest, int flags) {
  dest.writeInt(mElements.length);
  for(ArrayList<MyObject> element : mElements) {
    dest.writeParcelableArray(element.toArray(new MyObject[0]), flags);
  }
}

And the constructor:

private Wrapper(Parcel in) {
  int length = in.readInt();
  //Declare list
  for (int i = 0; i < length; i++) {
    MyObject[] read = in.readParcelableArray(Wrapper.class.getClassLoader());
    //add to list
  }
}